EP1584991B1 - Unité de déchargement de révélateur, récipient de réception de révélateur, système de transport de révélateur et appareil de formation d'images - Google Patents

Unité de déchargement de révélateur, récipient de réception de révélateur, système de transport de révélateur et appareil de formation d'images Download PDF

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Publication number
EP1584991B1
EP1584991B1 EP05102729.0A EP05102729A EP1584991B1 EP 1584991 B1 EP1584991 B1 EP 1584991B1 EP 05102729 A EP05102729 A EP 05102729A EP 1584991 B1 EP1584991 B1 EP 1584991B1
Authority
EP
European Patent Office
Prior art keywords
opening
developer
path
toner
receiving unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP05102729.0A
Other languages
German (de)
English (en)
Other versions
EP1584991A3 (fr
EP1584991A2 (fr
Inventor
Masahiro c/o Oki Data Corporation Haruyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Data Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oki Data Corp filed Critical Oki Data Corp
Publication of EP1584991A2 publication Critical patent/EP1584991A2/fr
Publication of EP1584991A3 publication Critical patent/EP1584991A3/fr
Application granted granted Critical
Publication of EP1584991B1 publication Critical patent/EP1584991B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
    • G03G15/0849—Detection or control means for the developer concentration
    • G03G15/0855—Detection or control means for the developer concentration the concentration being measured by optical means
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0865—Arrangements for supplying new developer
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0865—Arrangements for supplying new developer
    • G03G15/0875—Arrangements for supplying new developer cartridges having a box like shape
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0877—Arrangements for metering and dispensing developer from a developer cartridge into the development unit
    • G03G15/0881—Sealing of developer cartridges
    • G03G15/0886—Sealing of developer cartridges by mechanical means, e.g. shutter, plug
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S222/00—Dispensing
    • Y10S222/01—Xerography

Definitions

  • the present invention relates to a developer-discharging unit, a developer-receiving unit, developer transporting system, and an image forming apparatus.
  • a conventional image-forming apparatus such as a printer, a copying machine, and a facsimile machine uses developer such as toner.
  • Toner is supplied from a toner cartridge to a developing unit.
  • the developing unit supplies the toner to electrostatic latent images to develop the electrostatic latent images into visible images.
  • Some toner fails to be transferred onto a print medium and remains on a photoconductive drum after transfer of toner images onto a recording medium.
  • a cleaning unit removes the residual toner from the photoconductive drum and feeds the residual toner as waste toner to a toner-transporting path.
  • the waste toner is delivered through the toner-transporting path to a waste toner-receiving unit. In this manner, the toner is delivered from one section to another through various sections in the image forming apparatus.
  • EP 1 394 627 A2 describes a toner container which includes a waste toner chamber having a waste toner collection opening through which a toner discharging mechanism is inserted.
  • a guide member guides a discharging lid for opening and closing the waste toner collection opening.
  • the guide member extends inwardly from the vicinity of an upper periphery of the waste toner collection opening so that the toner discharging mechanism that has entered in the waste toner chamber is covered by the guide member from above.
  • US 6 266 511 B1 describes an image forming apparatus having a waste toner transporting path.
  • Fig. 23 illustrates a conventional interface between one section and another section.
  • Fig. 24 illustrates two sections in Fig. 23 coupled together.
  • Fig. 25 is a perspective view of the structure Fig. 24 .
  • toner is transported in a toner-transporting path 41 to a waste toner tank 44.
  • a first shutter 42 is pivotally mounted in a forward end portion of the toner-transporting path 41.
  • a second shutter 43 is mounted to the underside of the forward end portion of the toner-transporting path 41 and can slide back and forth in a direction in of movement of the toner-transporting path 41.
  • a third shutter 45 is pivotally mounted to a waste toner tank 44.
  • a spring 46 is mounted on the underside of the forward end portion of the toner-transporting path 41 and urges the second shutter 43 in a direction shown by arrow A.
  • the toner-transporting path 41 advances in a direction shown by arrow B to fit into an opening 40 formed in the waste toner tank 44, the toner-transporting path 41 pushes the third shutter 45 out of the way and the second shutter 43 abuts the waste toner tank 44 that serves as a topper.
  • the second shutter 43 is pushed back against the urging force of the spring 46, so that the first shutter 42 rotates about a pin 42a to downwardly open the forward end portion of the toner-transporting path 41.
  • the third shutter 45 is operatively associated with the forward and backward movements of the toner-transporting path 41, pivoting about a pin 45a to open and close the opening 40.
  • the present invention was made in view of the aforementioned problems of the conventional art.
  • An object of the invention is to provide a developer-ejecting unit, a developer receiving unit, a developer-transporting system, and an image forming apparatus that incorporates the developer-ejecting unit, developer receiving unit, and developer-transporting system.
  • a developer receiving unit for receiving developer from a discharging unit comprising a path configured to receive the developer from the developer discharging unit, the path configured to expand and contract in length, an opening through which the path is configured to communicate with the developer discharging unit, an abutting member comprising resilient material and configured to surround the opening such that when the developer discharging unit is brought into contact with the abutting member the opening is sealed, an urging member that is configured to urge the path in such a direction as to expand, and an opening-and-closing member that is configured to receive a drive force from the developer discharging unit when the developer discharging unit pushes the developer receiving unit, the drive force arranged to act on the opening-and-closing member in such a way that the opening-and-closing member causes the path to open, wherein the path includes a first path member and a second path member that is configured to be movable relative to the first path member, wherein the opening-and-closing
  • the second path member is configured to be slidably movable relative to the first path member.
  • the second path member fits over the first path member.
  • the second path member fits in the first path member.
  • the second path member has a guide surface and the opening-and-closing member has a guide surface.
  • the opening-and-closing member When the guide surface of the second path member pushes the guide surface of the opening-and-closing member, the opening-and-closing member is configured to open the path.
  • the first path member has a cleaning member is configured to rub a surface of the opening-and-closing member.
  • the second path member is configured to be resiliently movable relative to the first path in such a way that the path expands and contracts in length.
  • a developer transporting system comprising the developer receiving unit described above and a developer discharging unit comprising a second opening through which developer is configured to be discharged from the developer discharging unit, a second opening-and-closing member mounted to the developer discharging unit and configured to be rotatably and slidably received in the developer discharging unit, and to be rotatable to open and close the second opening, a second urging member mounted to the developer discharging unit and configured to urge the second opening-and-closing member in such a direction as to close the second opening, a second engagement portion formed on the second opening-and-closing member and configured to receive a drive force from the developer receiving unit when the second engagement portion pushes the developer receiving unit, the drive force arranged to act on the second engagement portion in such a way that the second engagement portion causes the second opening-and-closing member to open the second opening, wherein the second opening and closing member is configured to open the second opening only after the developer
  • An image forming apparatus incorporates the aforementioned developer transporting system.
  • Fig. 1 is a schematic view of an image-forming apparatus according to a first embodiment of the invention.
  • Fig. 2 is an exploded perspective view of one of process units according to the first embodiment.
  • the image-forming apparatus incorporates four process units 11a-11d aligned in tandem for forming yellow, magenta, cyan and black images, respectively.
  • a toner cartridge 35 is detachably attached to a corresponding one of the process units 11a-11d.
  • Each of the process units includes a mounting portion 36 that receives the toner cartridge 35 therein.
  • the mounting portion 36 has a toner-receiving opening 37 formed therein.
  • An exposing unit 14 and a transfer unit 29 are disposed adjacent to a corresponding one of the process units 11a-11d.
  • Each of the process units includes a photoconductive drum 12, around which a charging roller 13, a developing unit 15, and a cleaning unit 16 are disposed.
  • the cleaning unit 16 acts as a developer-discharging unit in the present invention.
  • a drive source and gears not shown, drive the photoconductive drum 12 in rotation.
  • the charging roller 13 uniformly charges the entire surface of the photoconductive drum 12.
  • the exposing unit 14 irradiates the charged surface of the photoconductive drum 12 with light to form an electrostatic latent image.
  • the developing unit 15 develops the electrostatic latent image with toner into a toner image. For this purpose, fresh, unused toner is supplied from the toner cartridge 35 to the developing unit 15.
  • the transfer roller 29 transfers the toner image onto a recording medium 10 such as paper fed from a paper cassette 17. Some toner fails to be transferred and remains on the photoconductive drum 12.
  • the residual toner on the photoconductive drum 12 is removed by the cleaning unit 16.
  • the cleaning unit 16 includes a case 16a, a blade (not shown), and a spiral conveyor 30 ( Fig. 3 ).
  • the blade is mounted on the case 16a in such a way that an edge of the blade abuts the surface of the photoconductive drum 12.
  • the spiral conveyor 30 rotates about its longitudinal axis and extends in parallel to a rotational axis of the photoconductive drum 12.
  • the spiral conveyor 30 is driven in rotation by a motor, not shown, and transports waste toner (residual toner) scraped from the photoconductive drum 12 to the cleaning unit 16.
  • the case 16a is a part of the case of one of the process units 11a-11d.
  • the paper cassette 17 holds a stack of the recording medium 10 therein.
  • a hopping roller 18 is disposed over the stack of the recording medium 10 to feed the recording medium 10 on a page-by-page basis into a medium transport path.
  • the feed rollers 19a and pinch roller 20a hold the recording medium 10 between them, and rotate in contact with each other to advance the recording medium 10 to the registry roller 19b and pinch roller 20b.
  • the feed rollers 19a and 19b cooperate with pinch rollers 20a and 20b to remove skew of the recording medium 10.
  • the registry roller 19b and pinch roller 20b are first stopped. Then, the feed roller 19a and pinch roller 20a feed the recording medium 10 forward until the entire leading edge of the recording medium 10 abuts the registry roller 19b and pinch roller 20b. Subsequently, the registry roller 19b and pinch roller 20b rotate to advance the recording medium 10.
  • the hopping roller 18 and registry rollers 19a and 19b are operatively driven in rotation by a drive motor, not shown.
  • a fixing unit 23 includes a heat roller 23a and a pressure roller 23b.
  • the fixing roller 23 and pressure roller 23b apply heat and pressure to the toner image that has been transferred onto the recording medium 10, thereby fixing the toner image into a permanent image.
  • the recording medium 10 leaves the fixing unit 23.
  • Discharging rollers 24a and 24b and pinch rollers 25a and 25b cooperate with one another to hold the recording medium in sandwiched relation and are rotated by a motor, not shown, to discharge the recording medium 10 out of the image-forming apparatus.
  • the hopping roller 18 feeds a top page of the stack of recording medium held in the paper cassette 17.
  • the feed roller 19a and pinch roller 20a cooperate with the registry roller 19b and pinch roller 20b to hold each page of the recording medium 10 between them in sandwiched relation.
  • the feed roller 19a, pinch roller 20a, registry roller 19b, and pinch roller 20b rotate to feed the recording medium 10 to a transfer point defined between the photoconductive drum 12 and the transfer roller 29 of the process unit 11a.
  • a yellow toner image is transferred onto recording medium 10.
  • the recording medium 10 passes through the process units 11b-11d in sequence so that the magenta, cyan, and black toner images are transferred onto the recording medium 10 in registration to form a full color toner image.
  • the fixing unit 23 fixes the full color toner image into a full color permanent image.
  • the recording medium 10 is held in sandwiched relation between the discharging roller 24a and the pinch roller 25a.
  • the discharging roller 24a and the pinch roller 25a rotate to transport the recording medium 10 to the discharging roller 24b and the pinch roller 25b, which in turn discharge the recording medium 10.
  • the spiral conveyor 30 transports the waste toner, removed from the photoconductive drum 12, to one end of the cleaning unit 16.
  • the toner is then received in a toner-receiving unit 32, which in turn supplies the waste toner to a waste toner tank 34.
  • the waste toner tank 34 is detachably mounted to the image-forming apparatus.
  • the toner-receiving unit 32 acts as a developer-receiving unit in the present invention.
  • the toner-receiving unit 32 includes a hollow cylindrical case 32a, a spiral conveyor 31, and a motor 33.
  • the hollow cylindrical case 32a extends in a direction in which the recording medium 10 is transported, and serves as a toner-transporting path.
  • the spiral conveyor 31 rotates in the case 32a to transport the toner.
  • the motor 33 drives the spiral conveyor 31 in rotation.
  • the waste toner removed from photoconductive drums 12 in the process units 11a-11d is transported in the case 32a in the opposite direction to the recording medium 10. In other words, the waste toner is transported to an upstream end with respect to the direction of travel of the recording medium 10.
  • the cleaning unit 16 cooperates with the toner-receiving unit 32 to form a developer transporting system according to the invention.
  • Fig. 3 illustrates the interface according to the first embodiment.
  • Fig. 4 is a perspective view of the interface and its surroundings.
  • Fig. 5 is a partial cross-sectional view illustrating the interface and its surroundings.
  • Fig. 6 is a cross sectional view illustrating the interface according to the first embodiment.
  • a hollow cylinder 51 is provided to form a toner path through which the waste toner is transported to the toner-receiving unit 32.
  • a shutter 53 is in the shape of a hollow-cylinder and has an opening 56 formed therein. The shutter 53 fits rotatably and slidably in the hollow cylinder 51, so that when the shutter 53 is rotated, the opening 56 moves into or out of alignment with the opening 52 depending on the position of the shutter 53 relative to the hollow cylinder 51.
  • a lever 54 that projects radially outwardly through the cylinder 51.
  • the lever 54 is urged by a spring 55 in such a direction (arrow C) as to close the shutter 53.
  • the lever 54 is limited its rotational position by a stopper, not shown.
  • the spring 55 is mounted between the lever 54 and a permanent portion of the cleaning unit 16.
  • the toner-receiving unit 32 includes a hollow cylinder 71 through which the waste toner is received, the hollow cylinder 71 being located immediately under the opening 52 of the cleaning unit 16.
  • a hollow cylinder 62 slidably fits over the hollow cylinder 71.
  • the hollow cylinders 71 and 62 have a rectangular cross section.
  • the hollow cylinder 71 has a lower opening h1 at its lower end and an upper opening h2 at its upper end.
  • the hollow cylinder 62 has a lower opening g1 at its lower end and an upper opening g2 at its upper end.
  • the hollow cylinder 62 has an inner dimension (perimeter) slightly larger than an outer dimension (perimeter) of the hollow cylinder 71 so that the outer surface of the hollow cylinder 71 can slide on the inner surface of the hollow cylinder 62.
  • the hollow cylinder 62 has projections f1 at a location close to the lower opening h1, the projections f1 radially outwardly projecting in the opposite directions.
  • Springs 67 are mounted between the projections f1 and the case 32a in such a way that the springs 67 urge the hollow cylinder 62 toward the cleaning unit 16.
  • the hollow cylinders 71 and 62 and the springs 67 cooperate to form a telescopic toner path, the springs 67 urging the hollow cylinder 62 in such a direction as to stretch the "telescope".
  • a shutter 63 is mounted to a lower end portion of the hollow cylinder 71, being on an inner surface of the hollow cylinder 71.
  • the shutter 63 pivots about a shaft 64 to open and close the lower opening g1 and h1 and the upper opening g2 and h2.
  • a torsion spring 65 is mounted on the shaft 64 and urges the shutter 63 in such a direction as to close the shutter 63.
  • the hollow cylinder 62 has an engagement portion 68 that extends along the inner wall of the hollow cylinder 71 from the upper opening h2 to the lower opening h1.
  • the engagement portion 68 pushes the short lever 66 to open the shutter 63.
  • a projection 70 extends upwardly in parallel to the axial directions of the hollow cylinders 71 and 62 from the case 32a toward the lever 54 of the cleaning unit 16.
  • An abutting member 69 is formed of a resilient material such as sponge and is disposed on the hollow cylinder 62 to surround the opening 52 formed in the underside of the hollow cylinder outer opening h2. The abutting member 69 surrounds completely all around the opening 52.
  • Fig. 7 illustrates the interface according to the first embodiment.
  • Fig. 8 illustrates the interface according to the first embodiment.
  • the cleaning unit 16 is also attached to the toner-receiving unit 32.
  • the cleaning unit 16 is first moved in a direction shown by arrow D. A bottom portion of the hollow cylinder 51 is brought into intimate contact with the abutting member 69, so that the opening 52 and the upper opening h2 are completely sealed against the environment. At this moment, the shutters 53 and 63 are at their closed positions and therefore the toner T is sealed in the cleaning unit 16.
  • the hollow cylinder 62 also moves against the urging force of the spring 67 while the hollow cylinder 51 is in intimate contact with the abutting member 69.
  • the engagement portion 68 pushes the short lever 66 causing the shutter 63 to open against the urging force of the torsion spring 65.
  • the projection 70 abuts the lever 54.
  • the projection 70 pushes up the lever 54 against the urging force of the spring 55. It is to be noted that the projection 70 pushes up the lever 54 against the urging force of the spring 55 to open the opening 52 only after the shutter 80 is opened completely or sufficiently.
  • the opening 52 is opened, the toner T is discharged from the cleaning unit 16 through the openings 56 and 52 into the toner-receiving unit 32.
  • the shutter 53 opens only when the shutter 63 opens at least sufficiently, ensuring that the toner T falls into the toner-receiving unit 32.
  • the outer surface of the cleaning unit 16 does not become contaminated with the toner T.
  • the urging force of the spring 67 causes the hollow cylinder 62 to move toward the cleaning unit 16 while the hollow cylinder 51 is in intimate contact with the abutting member 69.
  • the projection 68 moves out of engagement with the lever 66, so that the urging force of the torsion spring 65 causes the shutter 63 to close.
  • the cylinder 51 is still in intimate contact with the abutting member 69 so that the opening 52 and the upper opening h 2 are completely sealed.
  • the toner T does not leak nor does it scatter due to the opening and closing operations of the shutter 63.
  • the shutter 63 on the toner-receiving unit 32 side is opened only after the cylinder 51 and abutting member 69 engage with each other to completely seal the opening 52 and the upper opening h2 against the environment. Subsequently, the shutter 53 on the cleaning unit 16 side is opened.
  • the shutter 53 on the cleaning unit 16 side is closed with the cylinder 51 and abutting member 69 completely sealing against the environment. Then, the shutter 53 on the toner-receiving unit 32 side is closed.
  • the toner T does not leak nor does it scatter due to the opening and closing operations of the shutter 63.
  • Fig. 9 illustrates the interface according to a second embodiment.
  • a toner-receiving unit 32 has a hollow cylinder 71 provided to receive toner T ( Fig. 6 ), the hollow cylinder 71 being in alignment with an opening 52 formed in a cleaning unit 16.
  • a hollow cylinder 75 slidably fits in the hollow cylinder 71.
  • the hollow cylinders 71 and 76 have a rectangular cross section.
  • the hollow cylinder 71 has a lower opening h1 at its lower end and an upper opening h2 at its upper end.
  • the hollow cylinder 62 has a lower opening g1 at its lower end and an upper opening g2 at its upper end.
  • the cleaning unit 16 and the toner-receiving unit 32 cooperate to form a developer transporting system according to the invention.
  • the hollow cylinder 75 has an outer diameter slightly smaller than an inner diameter of the hollow cylinder 71 so that the outer surface of the hollow cylinder 75 can slide on the inner surface of the hollow cylinder 71 smoothly.
  • the hollow cylinder 75 has projections f2 at a location close to the lower opening h2, the projections f2 projecting radially outwardly.
  • Springs 67 are mounted between the projections f2 and a case 32a so that the springs 67 urge the hollow cylinder 75 toward the cleaning unit 16.
  • a shutter 63 is mounted to a lower end portion of the hollow cylinder 71, being pivotal about a shaft 64.
  • a torsion spring 65 is mounted on the shaft 64 and urges the shutter 63 in such a direction as to close the shutter 63.
  • a lever is provided to the shutter 63 and is operated to cause the shutter 63 to open and close. When a lever 66 is operated to open or close the shutter 63, the lower opening g1 and h1 and the upper openings g2 and h2 are opened or closed.
  • the second embodiment is configured such that the hollow cylinder 75 fitted into the hollow cylinder 71 and the shutter opens when the lever 66 pushes one end 75a of the hollow cylinder 75.
  • This configuration simplifies the construction of the hollow cylinder 75.
  • the toner T that falls in the hollow cylinder 75 does not leak.
  • a toner-receiving unit 32 has a hollow cylinder 76 is provided for receiving toner T ( Fig. 6 ), the hollow cylinder 76 being in alignment with an opening 52 of a cleaning unit 16 side.
  • a hollow cylinder 75 slidably fits into the hollow cylinder 76.
  • the hollow cylinders 75 and 76 have a rectangular cross section.
  • the hollow cylinder 71 has a lower opening h1 at its lower ends and an upper opening h2 at its upper end.
  • the hollow cylinder 62 has a lower opening g1 at its lower end and an upper opening g2 at its upper end.
  • the cleaning unit 16 and the toner-receiving unit 32 cooperate to form a developer transporting system according to the invention.
  • the hollow cylinder 75 has an outer diameter slightly smaller than an inner diameter of the hollow cylinder 76 so that the outer surface of the hollow cylinder 75 can slide on the inner surface of the hollow cylinder 76.
  • the hollow cylinder 75 has projections f2 at locations close to the lower opening h2, the projection f2 radially outwardly projecting.
  • Springs 67 are mounted between the projections f2 and a case 32a so that the springs 67 urge the hollow cylinder 75 toward the cleaning unit 16.
  • the hollow cylinder 75 has a guide surface (beveled surface) 75b at its one end 75a, the guide surface 75b being at an angle (about 45 degrees) with a direction of movement of the hollow cylinder 75.
  • a shutter 80 is supported by a supporting member, not shown, to close and open a lower opening g1 of the hollow cylinder 76, being on the inner side of the case 32a.
  • the shutter 80 moves in a direction perpendicular to a direction in which the hollow cylinder 75 moves, thereby opening and closing the lower openings g1 and h1.
  • the shutter 80 has a guide surface (beveled surface) 80a at its one end, the guide surface being inclined at the same angle as the guide surface 75b.
  • a spring 81 is disposed adjacent to the shutter 80 on the inner side of the case 32a, urging the shutter 80 in such a direction as to close the lower openings g1 and h1.
  • the guide surface 75b moves into engagement with the shutter 80.
  • the guide surface 75b cams the guide surface 80a to move the shutter 80 out of the way so that shutter 80 is opened against the urging force of the spring 81.
  • FIG. 11-13 illustrate the interface according to the third embodiment.
  • the cleaning unit 16 is also attached to the toner-receiving unit 32.
  • the hollow cylinder 51 is brought into intimate contact with the abutting member 69. This allows the opening 52 and the upper opening h2 to be completely sealed against the environment. At this moment, the shutters 53 and 80 are closed and therefore the toner T remains sealed in the cleaning unit 16.
  • the hollow cylinder 51 also moves against the urging force of the spring 67 while the hollow cylinder 51 is in intimate contact with the abutting member 69.
  • the guide surface 75b pushes the guide surface 80a, causing the shutter 80 to open against the urging force of the torsion spring 81.
  • the projection 70 abuts the lever 54.
  • the cleaning unit 16 is further moved in the D direction, the projection 70 pushes up the lever 54 against the urging force of the spring 55. It is to be noted that the projection 70 pushes up the lever 54 against the urging force of the spring 55 to open the opening 52 only after the shutter 80 is opened completely or sufficiently.
  • the opening 52 is opened, the toner T is discharged from the cleaning unit 16 through the openings 56 and 52 into the toner-receiving unit 32.
  • the shutter 53 opens only after the shutter 80 opens at least sufficiently, ensuring that the toner T falls into the toner-receiving unit 32. Thus , the outer surface of the cleaning unit 16 does not become contaminated with the toner T.
  • the urging force of the spring 67 causes the hollow cylinder 75 to move toward the cleaning unit 16 while the hollow cylinder 51 is in intimate contact with the abutting member 69. At this moment, the cylinder 51 remains in intimate contact with the abutting member 69, so that the opening 52 and the upper opening h2 are completely sealed against the environment. Thus, the toner T does not leak nor does it scatter due to the opening and closing operations of the shutter 80.
  • the shutter 80 on the toner-receiving unit 32 side is opened only after the cylinder 51 and the abutting member 69 move into sealed engagement with each other to completely seal the opening 52 and the upper opening h2 against the environment. Subsequently, the shutter 53 on the cleaning unit 16 side is opened.
  • the shutter 53 on the cleaning unit 16 side is closed with the cylinder 51 and abutting member 69 completely sealing against the environment. Then, the shutter 80 on the toner-receiving unit 32 side is closed. Then, the shutter 80 is closed.
  • the toner T does not leak nor does it scatter due to the opening and closing operations of the shutter 80.
  • the hollow cylinder 75 fits in the hollow cylinder 76, so that when the guide surface 75b of the hollow cylinder 75 pushes the guide surface 80a, the shutter 80 opens.
  • This configuration simplifies the construction of the hollow cylinder 75 and prevents the toner T from leaking when the toner T falls into the toner-receiving unit 32 through the hollow cylinder 75.
  • the shutter 80 opens and closes in a direction perpendicular to a direction in which the toner T falls from the cleaning unit 16 into the toner-receiving unit 32, the shutter 80 does not raise the dust of toner.
  • Figs. 14-17 illustrate an interface according to a fourth embodiment.
  • a cleaning element 85 adjacent to a lower opening g1 of a hollow cylinder 76.
  • the cleaning element 85 slides on the surface of the shutter 80 so that the toner particles are cleaned from the shutter 80.
  • the cleaning unit 16 is also attached to the toner-receiving unit 32.
  • the hollow cylinder 51 is brought into intimate contact with the abutting member 69. This allows the opening 52 and the upper opening h2 to be completely sealed against the environment. At this moment, the shutters 53 and 80 are still closed and therefore the toner T remains sealed in the cleaning unit 16.
  • the hollow cylinder 75 also moves against the urging force of the spring 67 while the hollow cylinder 51 is in intimate contact with the abutting member 69.
  • the guide surface (beveled surface) 75b pushes the guide surface (beveled surface) 80a causing the shutter 80 to open against the urging force of the torsion spring 81.
  • the cleaning element rubs the surface of the shutter 80 so that the toner particles are cleaned from the surface of the shutter 80.
  • a projection 70 abuts a lever 54 as shown in Fig. 16 .
  • the projection 70 pushes the lever 54 against the urging force of a spring 55 only after the shutter 80 is opened completely or sufficiently.
  • the opening 52 is opened so that the toner T is discharged from the cleaning unit 16 into the toner-receiving unit 32.
  • the shutter 53 opens only after the shutter 80 opens at least sufficiently, ensuring that the toner T falls into the toner-receiving unit 32 but does not adhere to the outer surface of the shutter 80. Even if the toner may adhere to the outer surface of the shutter 80, the cleaning member 85 rubs it off.
  • the cleaning member 85 rubs the outer surface of the shutter 80 during the movement of the shutter 80.
  • the cleaning unit 16 and the toner-receiving unit 32 cooperate to form a developer transporting system according to the invention.
  • Fig. 18 illustrates an interface according to a fifth embodiment.
  • a toner-receiving unit 32 has a hollow cylinder 77 is provided to receive toner T, the hollow cylinder 77 being in alignment with an opening 52 of a cleaning unit 16.
  • a hollow cylinder 90 is mounted on the hollow cylinder 77.
  • the hollow cylinder 90 is made of a resilient material in the shape of an accordion and therefore it can expand and contract resiliently.
  • the hollow cylinders 77 and 90 have a rectangular cross section.
  • the hollow cylinder 77 has a lower opening g1 at its lower end and an upper opening g2 at its upper end.
  • the hollow cylinder 90 has a lower opening h1 at its lower end and an upper opening h2 at its upper end.
  • the cleaning unit 16 and the toner-receiving unit 32 cooperate to form a developer transporting system according to the invention.
  • a generally rectangular loop-like member 91 is mounted on the top of the hollow cylinder 90.
  • the hollow cylinder 90 urges the cleaning unit 16.
  • the rectangular loop-like member 91 has a projection 92 that extends downwardly from the upper opening h2 toward the lower opening g1.
  • the hollow cylinders 77 and 90 cooperate to form a path of toner that can expand and contract.
  • a shutter 63 is mounted to a lower end portion of the hollow cylinder 77, being on an inner surface of the hollow cylinder 77.
  • a short lever 66 is provided for operating the shutter 63. When the short lever 66 is operated, the shutter 63 pivots about a shaft 64 to open and close the lower opening g1.
  • a torsion spring 65 is mounted on the shaft 64 and urges the shutter 63 in such a direction as to close the shutter 63.
  • FIGs. 19-21 illustrate the interface according to the fifth embodiment.
  • the cleaning unit 16 is also attached to the toner-receiving unit 32.
  • the hollow cylinder 51 is brought into intimate contact with the abutting member 69. This allows the opening 52 and the upper opening h2 to be completely sealed against the environment. At this moment, the shutters 53 and 63 are still closed and therefore the toner T remains sealed in the cleaning unit 16.
  • the hollow cylinder 90 also contracts against its own urging force while the hollow cylinder 51 is in intimate contact with the abutting member 69.
  • the projection 92 pushes the short lever 66 causing the shutter 63 to open.
  • the projection 70 abuts the lever 54.
  • the cleaning unit 16 is further moved in the D direction, the projection 70 pushes up the lever 54 against the urging force of the spring 55. It is to be noted that the projection 70 pushes up the lever 54 against the urging force of the spring 55 to open the opening 52 only after the shutter 80 is opened completely or sufficiently.
  • the opening 52 is opened, the toner T is discharged from the cleaning unit 16 through the openings 56 and 52 into the toner-receiving unit 32.
  • the shutter 53 opens only when the shutter 64 opens at least sufficiently, ensuring that the toner T falls into the toner-receiving unit 32.
  • the outer surface of the cleaning unit 16 does not become contaminated with the toner T.
  • the urging force of the hollow cylinder 90 causes the loop like member 91 to move toward the cleaning unit 16 while the hollow cylinder 51 is in intimate contact with the abutting member 69.
  • the projection 92 moves out of engagement with the lever 66, so that the urging force of the torsion spring 65 causes the shutter 63 to close.
  • the cylinder 51 remains in intimate contact with the abutting member 69, so that the opening 52 and the upper opening h2 are completely sealed against the environment.
  • the toner T does not leak nor does it scatter due to the opening and closing operations of the shutter 63.
  • the intimate contact engagement between the hollow cylinder 90 and the hollow cylinder 77 completely prevents the toner T from leaking. Further, the hollow cylinder 90 urges the loop-like member 91 against the cleaning unit 16. This eliminates the need for providing a spring for urging the hollow cylinder against the cleaning unit 16, and simplifies the configuration of the toner-receiving unit 32.
  • Fig. 22 illustrates an interface according to a sixth embodiment.
  • a toner-receiving unit 32 has a hollow cylinder 77 provided for receiving toner T, the hollow cylinder 77 being in alignment with an opening 52 of a cleaning unit 16.
  • a hollow cylinder 90 is mounted on the hollow cylinder 77.
  • the hollow cylinder 90 is formed of a resilient material in the shape of an accordion and therefore it can expand and contract resiliently.
  • the hollow cylinders 77 and 90 have a rectangular cross section.
  • the hollow cylinder 77 has a lower opening g1 at its lower end and the hollow cylinder 90 has a lower opening h1 at its lower end and an upper opening h2 at its upper end.
  • the cleaning unit 16 and the toner-receiving unit 32 cooperate to form a developer transporting system according to the invention.
  • a rectangular loop-like member 91 is mounted on the top of the hollow cylinder 90.
  • the hollow cylinder 90 urges the rectangular loop-like member 91 against the cleaning unit 16.
  • the rectangular loop-like member 91 has two projections 95 and 96 diametrically opposite with respect to an axis of the hollow cylinder 90 parallel to a direction in which the hollow cylinder 90 expands and contracts.
  • the projections 95 and 96 extend downwardly from the upper opening h2 to the lower opening g1.
  • the hollow cylinders 77 and 90 cooperate to form a path of toner that can expand and contract.
  • the guide 95 and 96 extending in the hollow cylinder 90 prevents the toner T from adhering to or staying at the inner surfaces in the shape of an accordion. This allows the shutter 63 to open and close reliably.
  • the hollow cylinders 62, 71, 75-77 and 90 have been described as having a rectangular cross section.
  • the cross section may be other shapes, e.g., a circle, a polygon, or the like.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Cleaning In Electrography (AREA)
  • Dry Development In Electrophotography (AREA)

Claims (9)

  1. Unité de réception de révélateur (32) pour recevoir le révélateur d'une unité de décharge (16), comprenant :
    une trajectoire (62+71, 75+71, 75+76, 90+77) configurée pour recevoir le révélateur de l'unité de décharge de révélateur (16), ladite trajectoire (62+71, 75+71, 75+76, 90+77) étant configurée pour subir une expansion et se contracter en longueur ;
    une ouverture (g2, h2) à travers laquelle ladite trajectoire (62+71, 75+71, 75+76, 90+77) est configurée pour communiquer avec l'unité de décharge de révélateur (16) ;
    un élément de butée (69) comprenant un matériau résilient et configuré pour entourer ladite ouverture (g2, h2) de sorte que lorsque l'unité de décharge de révélateur (16) est amenée en contact avec ledit élément de butée (69), ladite ouverture (g2, h2) est scellée ;
    un élément de poussée (67, 90) configuré pour pousser ladite trajectoire (62+71, 75+71, 75+76, 90+77) dans une direction telle qu'elle subit une expansion ; et
    un élément d'ouverture et de fermeture (63, 66, 64, 80) configuré pour recevoir une force d'entraînement de l'unité de décharge de révélateur (16) lorsque l'unité de décharge de révélateur (16) pousse l'unité de réception de révélateur (32), la force d'entraînement étant agencée pour agir sur ledit élément d'ouverture et de fermeture (63, 66, 64, 80) de sorte que ledit élément d'ouverture et de fermeture (63, 66, 64, 80) amène ladite trajectoire (62+71, 75+71, 75+76, 90+77) à s'ouvrir ;
    dans laquelle ladite trajectoire (62+71, 75+71, 75+76, 90+77) comprend un premier élément de trajectoire (71, 76, 77) et un second élément de trajectoire (62, 75, 90) configuré pour être mobile par rapport au premier élément de trajectoire (71, 76, 77) ;
    dans laquelle ledit élément d'ouverture et de fermeture (63, 66, 64, 80) comprend une partie de mise en prise (66, 80a) ;
    dans laquelle lorsque ledit second élément de trajectoire (62, 75, 90) se déplace par rapport au premier élément de trajectoire (71, 76, 77) contre ledit élément de poussée (67, 90), le second élément de trajectoire (62, 75, 90) est configuré pour mettre en prise la partie de mise en prise (66, 80a) pour amener ledit élément d'ouverture et de fermeture (63, 66, 64, 80a) à ouvrir ladite trajectoire (62+71, 75+71, 75+76, 90+77) ;
    dans laquelle ledit élément d'ouverture et de fermeture (63, 66, 64, 80) est configuré pour ouvrir ladite trajectoire (62+71, 75+71, 75+76, 90+77) uniquement après que l'unité de décharge de révélateur (16) a été amenée en contact avec ledit élément de butée (69).
  2. Unité de réception de révélateur (32) selon la revendication 1, dans laquelle le second élément de trajectoire (62, 75) est configuré pour être mobile de manière coulissante par rapport au premier élément trajectoire (71, 76).
  3. Unité de réception de révélateur (32) selon la revendication 2, dans laquelle le second élément de trajectoire (62) s'adapte sur le premier élément de trajectoire (71).
  4. Unité de réception de révélateur (32) selon la revendication 2, dans laquelle le second élément de trajectoire (75) s'adapte dans le premier élément de trajectoire (76).
  5. Unité de réception de révélateur (32) selon la revendication 4, dans laquelle le second élément de trajectoire (62) a une surface de guidage (75b) et ledit élément d'ouverture et de fermeture (80) a une surface de guidage (80a) ;
    dans laquelle lorsque la surface de guidage (75b) du second élément de trajectoire (62) pousse la surface de guidage (80a) dudit élément d'ouverture et de fermeture (80), ledit élément d'ouverture et de fermeture (80) est configuré pour ouvrir ladite trajectoire (62+71, 75+71, 75+76, 90+71).
  6. Unité de réception de révélateur (32) selon la revendication 5, dans laquelle le premier élément de trajectoire (76) a un élément de nettoyage (85) configuré pour frotter une surface dudit élément d'ouverture et de fermeture (80).
  7. Unité de réception de révélateur (32) selon la revendication 1, dans laquelle le second élément de trajectoire (90) est configuré pour être mobile de manière résiliente par rapport au premier élément de trajectoire (77) de sorte que ladite trajectoire subit une expansion et se contracte en longueur.
  8. Système de transport de révélateur comprenant :
    une unité de réception de révélateur selon l'une quelconque des revendications précédentes ;
    une unité de décharge de révélateur (16) comprenant :
    une seconde ouverture (52) à travers laquelle le révélateur est configuré pour être déchargé de l'unité de décharge de révélateur (16) ;
    un second élément d'ouverture et de fermeture (53) monté sur l'unité de décharge de révélateur (16) et configuré pour être reçu de manière rotative et coulissante dans l'unité de décharge de révélateur (16) et pour être entraîné en rotation afin d'ouvrir et de fermer ladite seconde ouverture (52) ;
    un second élément de poussée monté sur l'unité de décharge de révélateur (16) et configuré pour pousser ledit second élément d'ouverture et de fermeture (53) dans une position telle qu'il ferme ladite seconde ouverture (52) ;
    une seconde partie de mise en prise (54) formée sur ledit second élément d'ouverture et de fermeture (53) et configuré pour recevoir une force d'entraînement de l'unité de réception de révélateur (32), lorsque ladite seconde partie de mise en prise (54) pousse l'unité de réception de révélateur (32), la force d'entraînement étant agencée pour agir sur ladite seconde partie de mise en prise (54) de sorte que ladite seconde partie de mise en prise (54) amène ledit second élément d'ouverture et de fermeture (53) à ouvrir ladite seconde ouverture (52) ;
    dans lequel le second élément d'ouverture et de fermeture (53) est configuré pour ouvrir ladite seconde ouverture (52) uniquement après que l'unité de décharge de révélateur (16) est amenée en contact avec l'élément de butée (69) de l'unité de réception de révélateur (32) de sorte que la seconde ouverture (52) s'aligne avec la trajectoire (62+71, 75+71, 75+76, 90+77) de l'unité de réception de révélateur (32).
  9. Appareil de formation d'image comprenant le système de transport de révélateur selon la revendication 8.
EP05102729.0A 2004-04-09 2005-04-07 Unité de déchargement de révélateur, récipient de réception de révélateur, système de transport de révélateur et appareil de formation d'images Expired - Fee Related EP1584991B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004116141 2004-04-09
JP2004116141A JP4578848B2 (ja) 2004-04-09 2004-04-09 現像剤受取ユニット、現像剤搬送システム及び画像形成装置

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EP1584991A2 EP1584991A2 (fr) 2005-10-12
EP1584991A3 EP1584991A3 (fr) 2012-01-25
EP1584991B1 true EP1584991B1 (fr) 2016-12-07

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US (1) US7194230B2 (fr)
EP (1) EP1584991B1 (fr)
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US7548710B2 (en) * 2006-10-25 2009-06-16 Lexmark International, Inc. Dual sliding shutter system
JP4511583B2 (ja) * 2007-11-09 2010-07-28 シャープ株式会社 トナー補給装置、画像形成装置およびカラー画像形成装置
JP5624294B2 (ja) * 2009-09-02 2014-11-12 コニカミノルタ株式会社 イメージングユニット及びこれを備えた画像形成装置
JP4842356B2 (ja) * 2009-09-15 2011-12-21 シャープ株式会社 トナーカートリッジおよびこれを用いる画像形成装置
JP6111835B2 (ja) 2013-05-09 2017-04-12 ブラザー工業株式会社 画像形成装置
JP6150661B2 (ja) * 2013-08-12 2017-06-21 キヤノン株式会社 現像剤補給装置
BR122019002419B1 (pt) * 2015-02-27 2023-10-31 Canon Kabushiki Kaisha Cartucho e aparelho de formação de imagem eletrofotográfico
US9459557B1 (en) * 2015-07-24 2016-10-04 Kabushiki Kaisha Toshiba Image forming apparatus
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JP6855716B2 (ja) * 2016-09-14 2021-04-07 富士ゼロックス株式会社 粉体収容器、現像器、および画像形成装置
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Also Published As

Publication number Publication date
JP4578848B2 (ja) 2010-11-10
CN100594440C (zh) 2010-03-17
EP1584991A3 (fr) 2012-01-25
CN1680884A (zh) 2005-10-12
EP1584991A2 (fr) 2005-10-12
JP2005300873A (ja) 2005-10-27
US20050226658A1 (en) 2005-10-13
US7194230B2 (en) 2007-03-20

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